package com.changgou.controller;

import com.changgou.entity.Result;
import com.changgou.entity.StatusCode;
import com.changgou.util.FastDFSClient;
import com.changgou.util.FastDFSFile;
import org.apache.commons.lang.StringUtils;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;

@RestController
@RequestMapping("/file")
public class FileController {

    @PostMapping("/upload")
    public Result uploadFile(MultipartFile file) {

        try {
            if (file == null) {
                throw new RuntimeException("文件不存在");
            }

            //获取文件完整名称
            String originalFilename = file.getOriginalFilename();
            if (StringUtils.isEmpty(originalFilename)) {
                throw new RuntimeException("文件不存在");
            }

            //获取文件扩展名称
            String extName = originalFilename.substring(originalFilename.lastIndexOf(".") + 1);

            //获取文件内容
            byte[] content = file.getBytes();

            //创建文件上传的封装实体
            FastDFSFile fastDFSFile = new FastDFSFile(originalFilename, content, extName);

            //利用工具类上传文件
            String[] uploadResult = FastDFSClient.upload(fastDFSFile);

            String url = FastDFSClient.getTrackerUrl() + uploadResult[0] + "/" + uploadResult[1];
            return new Result(true, StatusCode.OK, "文件上传成功", url);
        } catch (IOException e) {
            e.printStackTrace();
            return new Result(false, StatusCode.ERROR, "文件上传失败");
        }
    }
}
